p22 recommit into p22-final

[illuminati2285]

I have created this new branch directly from col331/p22-sleeplocks and copied over my P22 changes to ensure a clean diff.
Link to previous PR for reference: [#215]

[codenet]

I still see very large diffs on defs.h, proc.c etc. Is it just me?

[codenet]

Let me clean this to simplify your life :-)

[codenet]

Ok, I think different new line characters (probably because you are using windows?) are inflating the diffs. You can open your files in vim and do :set ff=unix and save them.

I pulled and cleaned (all of?) your changes into https://github.com/codenet/col331/tree/p22-temp and resolved merge conflicts. You can check that branch and verify if all your changes are covered. (I actually directly copied some relevant parts from xv6-public, so there may be differences. Please check carefully).

If you are satisfied, we can raise the PR from p22-temp to p22-sleeplocks. Otherwise, you can clean up diffs in this PR and I will close the p22-temp branch. Please comment here after your diffs are clean.

[illuminati2285]

I cleaned this PR up. The issue was the CRLF line endings (since I am working on WSL I couldn't see them locally ,thanks for pointing that out). The diffs seem to be accurate now, so we can proceed with merging this PR and close the p22-temp branch. Regret the inconvenience caused.

[illuminati2285]

Sir @codenet , I noticed this PR was closed without merging. Could you please let me know the reason? If any changes are needed, I would be happy to update the PR.